Wrench.



PATENTED NOV. 3,190 I. WBISNEK.

WRENCH.

APPLIOATION FILED JULY 7 1903.

no MODEL.

Patented November 3, 1903.

PATENT OFFIC IGNATZ WEISNEK, OF FEDERAL, PENNSYLVANIA.

WRENCH.

V SPECIFICATION forming part of Letters Patent No. 743,359, datedNovember 3, 1903.

Application filed July '7, 1 903.

To all whom it may concern:

Be itknown that I, IGNATZ WEISNEK, a citi zen of the United States ofAmerica, residing at Federal, in the county of Allegheny and State ofPennsylvania, have invented certain new and usefullmprovementsiuWrenches, of which the following is'a specification, reference being badtherein to the accompanying drawings.

This invention relates to certain new and usefulimprovements inWrenches, and relates more particularly to that tpye generally known inthe trade as monkey-wrenches; and the primary objectof this invention isto simplify the construction and facilitate the operation of the wrenchwith one hand.

Briefly described, the invention comprises a wrench-shank provided onone end with a rigid jaw and on its other end carrying a suitablehandle. A movable jaw is slidably mounted on the wrench-shank, andwithin this movable jaw is apivotally-mounted toothed dog or pawl thatis under the tension of'a spring and is thus normally held in engagementwith teeth carried on the inner face of the wrench-shank. Pivot-allyconnected to one end of the toothed dog is a yoke which straddles thewrench-shank and has movement transverse to said shank, the outer end ofthis yoke carryinga thumb-piece, by means of which the yoke may beoperated in order to force the toothed dog away from the teeth of thewrench-shank and permit the sliding jaw to be moved to any desiredposition on the shank. A plate is attached to the back .of the slidingjaw and carries projecting fingers, which lie in back of the straps ofthe yoke, and thus hold the yoke in its proper position to prevent thesamefrom falling toward the handle end of the wrench.

All of the above construction will be hereinafter more fully described,and specifically pointed out in the claim, and in describing theinvention in detail reference is had to the accompanying drawings,forming a part of this specification, and wherein like nu merals ofreference indicate like parts through out the several views, in which-Figure 1 is a plan view of my improved wrench. Fig. 2 is a rearelevation partly broken away. Fig. 3 is a plan view with the sliding jawin section to showthe toothed dog.

Serial No. 164,587- (No model.)

Fig. 4 is a detached detail perspective view of the operating-yoke. Fig.5 is a like view of the plate for holding the yoke in proper position. 1

To put my invention into practice, Iprovide the wrench-shank 1, which atits outer end carries a rigid jaw 2 and at its other end is providedwith a suitably-secured handle 3. On the wrench-shank is mounted theslidable jaw 4:, which is provided with an interior recess 5, in whichis located the toothed dog 6. This toothed dog 6 has its inner endpivotally secured, as at 7, to the sliding jaw,and the outer end 8 ofthe dog projects beyond the rear end of the slidable jaw. The teeth ofthe dog 6 are held normally in engagement with the teeth 8 of thewrench-shank by means of a spring 9, which bearsagainst the dog 6, asclearly seen in Fig. 3 of the drawings. The teeth 8 of the wrench-shankmay be integral with the wrench-shank, or the latter may be groovedlongitudinally on its inner face and a bar providedwith teeth set inthis groove and suitably secured, the teeth of course projecting beyondthe inner face of the bar. In order to operate the dog 6 so as to movethe teeth thereof out of engagement with the teeth of the wrench-shank,I provide a yoke 10, which straddles the wrench-shank 1 and isbifurcated or split at one end to receive therein the end 8 of the dog,which is pivotally secured in position. The other end of this yoke ispro vided with a thumb-piece 11, which lies directly over the back ofthe Wrench-shank l and is preferably knurled, as seen in Figs. 2 and 4:of the drawings. Attached to the slidable jaw 4.- by means of a screw 12or in any other suitable manner is a plate 14, which has projectingfingers 15 to engage in back of the side straps of the yoke 10, asclearly seen in Fig. 1 of the drawings, thus preventing the yoke frommoving toward the handle end of the wrench. The thumb-piece 11 projectsrearwardly beyond the plate l4,as seen in Figs. 1, 2, and 3, whereby itmaybe readily engaged by the operator.

To operate the wrench, it will be apparent that it is only necessary todepress the thumbpiece 11 toward the wrench-shank in order to cause theyoke 10 to move the dog 6 in a manner to disengage its teeth from theteeth of the wrench-shank and allow the shifting ICO of the slidable jawinto any desired position upon the wrench-shank. As soon as pressure onthe thumb-piece 11 is removed the spring 9 will force the teeth of thedog into engagement with the teeth of the wrench-shank and hold theslidable jawin the adjusted position.

It will be apparent that when the yoke is depressed and the dog thusdisengaged the operator may move the slidable jaw by the aid of thethumb with which he depresses the yoke either toward the rigid jaw oraway from the same in order to give the desired space between the twojaws.

Although in the present illustration I have shown the teeth of the dogand those of the wrench-shank as both being straight-cut teeth, it willbe apparent that if the teeth of the wrench-shank are made inclinedtoward the rigid jaw the adjustment of the slidable jaw would beobtained without requiring the depressing of the yoke 10, onlynecessitating the depressing of the yoke and the consequentdisengagement of the dog when it was desired to move the slidable jawtoward the handle end of the wrench.

It will be noted that various changes may be made in the details ofconstruction without departing from the general spirit ofv my invention.

Having fully described myinvention, what I claim as new, and desire tosecure by Letters Patent, is-

In a wrench,the combination with a wrenchshank having teeth on its innerface and provided at its outer end with a. rigid jaw, of a slidable jawmounted on the wrench-shank and provided with a recess, a toothed dogpivotally mounted in said recess with its rear end projecting beyond theslidable jaw, a spring normally holding said toothed dog in engagementwith the teeth of the wrenchshank, a yoke straddling the wrench-shankand pivotally connected to the extending end of the toothed dog, athumb-piece carried by said yoke, and a plat-e secured to the slidablejaw and provided with inwardly projecting fingers engaging the yoke tohold the latter in position, substantially as described.

In testimony whereof I affix my signature in the presence of twowitnesses.

lGNATZ VVEISNEK. Witnesses:

R. A. RUEss, E. E. POTTER.

